Earticle

With the expansion of wireless network technologies and the emergence of novel mobile applications, the 3rd Generation (3G) communication is moving to the 4th Generation (4G) communication. Comparing to preceding versions, one elementary difference is that 4G wireless networks will operate entirely on the TCP/IP, which would cause greater risks in terms of safety and reliability. In this paper, a new high security architecture for Long Term Evolution (LTE) core network server is proposed and designed. There are asynchronous array of simple processors and two physically isolated high-speed system buses in the security architecture, which ensure only one bus can be connected to array of processors at the same time. Experiment results show that the security architecture can effectively prevent external threats from accessing network resources.

Group key management (GKM) technique is employed for ensuring security and integrity in Mobile Ad hoc Networks (MANET). It is the fundamental component of secure group communication systems. It involves distribution, updation and revocation of group keys. GKM can be carried out through many approaches. Existing studies on GKM techniques in MANET did not provide detailed analysis. This survey presents various GKM techniques for MANETs. The existing GKM techniques are classified into three categories namely centralized, distributed and hierarchical. Each of these techniques are explained with their advantages and disadvantages.